Union County Bridge Report Card

Union County scores 90 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A90 / 100

Local infrastructure snapshot

Union County, Ohio

Union County has 221 bridges in the National Bridge Inventory, with 8 rated poor and 0 rated scour-critical. Its poor-condition share of 3.6% is at or below the 4.7% statewide average. Poor-condition bridges carry about 35,028 daily vehicle crossings.

221Total Bridges

8Poor (3.6%)

64Fair (29.0%)

0Scour-Critical

Quote-Ready Local Facts

3.6%of county bridges are in poor condition, compared with 4.7% statewide and 6.7% nationally.

35,028daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Union County a Bridge Condition Exposure Score of 90/100 (A). The county has 221 bridges in the National Bridge Inventory, including 8 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 35,028 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	3.6%	7.2
Poor-condition traffic exposure	25	3.7% of measured traffic	2.8
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	41 years vs 48 nationally	0.0
Traffic-data completeness	5	937,267 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	3.6%
State Poor-Condition Share	4.7%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	41 years
Poor-Condition Traffic Exposure	35,028 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 36 over Mill Creek — 18,155 vehicles/day Oldest Listed BridgeC87a Axe Handle RD over Little Darby — built in 1870 All County BridgesBrowse every bridge record in Union County.

Top Bridges to Watch in Union County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 36 over Mill Creek	Poor condition + traffic exposure	Poor	18,155	1950
Usr 42 over Robinson Run	Poor condition + traffic exposure	Poor	8,156	1982
Usr 36 over Treacle Creek	Poor condition + traffic exposure	Poor	4,977	1966
SR 161 over Little Darby Creek	Poor condition + traffic exposure	Poor	1,461	1963
SR 37 over Bokes Creek	Poor condition + traffic exposure	Poor	836	1982
CR 36 (bg Rd) over US 33	Poor condition + traffic exposure	Poor	562	1968
Cr67d Streng RD over Big Darby	Poor condition + traffic exposure	Poor	474	1914
Cr322a Sanders RD over Rush Creek	Poor condition + traffic exposure	Poor	407	1970
US 33 over Ramp Over C-133	High traffic	Good	39,548	1988
Usr 33 over Ramp Over Sr245	High traffic	Good	27,926	1988

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.