Union County Bridge Report Card

Union County scores 54 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F54 / 100

Local infrastructure snapshot

Union County, Iowa

Union County has 172 bridges in the National Bridge Inventory, with 55 rated poor and 1 rated scour-critical. Its poor-condition share of 32.0% is above the 18.6% statewide average. Poor-condition bridges carry about 4,281 daily vehicle crossings.

172Total Bridges

55Poor (32.0%)

64Fair (37.2%)

1Scour-Critical

Quote-Ready Local Facts

32.0%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

4,281daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Union County a Bridge Condition Exposure Score of 54/100 (F). The county has 172 bridges in the National Bridge Inventory, including 55 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 4,281 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	32.0%	40.0
Poor-condition traffic exposure	25	6.1% of measured traffic	4.6
Scour-critical bridge share	20	0.6%	1.2
Average age vs national baseline	10	46 years vs 48 nationally	0.0
Traffic-data completeness	5	70,520 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	32.0%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.6%
Average Bridge Age	46 years
Poor-Condition Traffic Exposure	4,281 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeLincoln ST over Hurley Creek — 875 vehicles/day Oldest Listed BridgeLocal over Stream — built in 1900 All County BridgesBrowse every bridge record in Union County.

Top Bridges to Watch in Union County

Bridge	Reason	Condition	Daily Traffic	Year Built
Local RD over Stream	Poor condition + traffic exposure	Poor	5	1973
Lincoln ST over Hurley Creek	Poor condition + traffic exposure	Poor	875	1973
FM over Br W Platte River	Poor condition + traffic exposure	Poor	788	1957
FM over Creek	Poor condition + traffic exposure	Poor	409	1964
Local So.cherry over Small Stream	Poor condition + traffic exposure	Poor	278	1968
FM over East Platte River	Poor condition + traffic exposure	Poor	199	1963
Local over Stream	Poor condition + traffic exposure	Poor	180	1985
FM over Outlet Green Valley Lk	Poor condition + traffic exposure	Poor	159	1951
Local over Stream	Poor condition + traffic exposure	Poor	123	1981
Loc 170th ST over Small Stream	Poor condition + traffic exposure	Poor	113	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.