Winnebago County Bridge Report Card

Winnebago County scores 56 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F56 / 100

Local infrastructure snapshot

Winnebago County, Iowa

Winnebago County has 54 bridges in the National Bridge Inventory, with 16 rated poor and 0 rated scour-critical. Its poor-condition share of 29.6% is above the 18.6% statewide average. Poor-condition bridges carry about 1,598 daily vehicle crossings.

54Total Bridges

16Poor (29.6%)

20Fair (37.0%)

0Scour-Critical

Quote-Ready Local Facts

29.6%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

1,598daily 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 Winnebago County a Bridge Condition Exposure Score of 56/100 (F). The county has 54 bridges in the National Bridge Inventory, including 16 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 1,598 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	29.6%	40.0
Poor-condition traffic exposure	25	5.9% of measured traffic	4.4
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	27,036 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	29.6%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	41 years
Poor-Condition Traffic Exposure	1,598 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeFM over Blue Earth River — 938 vehicles/day Oldest Listed BridgeLocal over N Fork Buffalo Creek — built in 1900 All County BridgesBrowse every bridge record in Winnebago County.

Top Bridges to Watch in Winnebago County

Bridge	Reason	Condition	Daily Traffic	Year Built
FM over Blue Earth River	Poor condition + traffic exposure	Poor	938	1924
Broadway AVE over Winnebago River	Poor condition + traffic exposure	Poor	245	1975
Local over Drainage Ditch	Poor condition + traffic exposure	Poor	82	1928
Local over Drainage Ditch	Poor condition + traffic exposure	Poor	72	1976
Local over Drainage Ditch	Poor condition + traffic exposure	Poor	41	1966
Local over Beaver Creek	Poor condition + traffic exposure	Poor	41	1976
Local over Drainage Ditch	Poor condition + traffic exposure	Poor	35	1950
Local over Beaver Creek	Poor condition + traffic exposure	Poor	35	1985
Local over Buffalo Creek	Poor condition + traffic exposure	Poor	26	1975
Local over Drainage Ditch	Poor condition + traffic exposure	Poor	26	1985

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.