Warren County Bridge Report Card

Warren 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

Warren County, Iowa

Warren County has 238 bridges in the National Bridge Inventory, with 48 rated poor and 3 rated scour-critical. Its poor-condition share of 20.2% is above the 18.6% statewide average. Poor-condition bridges carry about 8,496 daily vehicle crossings.

238Total Bridges

48Poor (20.2%)

88Fair (37.0%)

3Scour-Critical

Quote-Ready Local Facts

20.2%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

8,496daily vehicle crossings are on poor-condition bridges in the county.

3bridges are rated scour-critical, or 1.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Warren County a Bridge Condition Exposure Score of 56/100 (F). The county has 238 bridges in the National Bridge Inventory, including 48 in poor condition and 3 rated scour-critical. Poor-condition bridges carry about 8,496 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	20.2%	40.0
Poor-condition traffic exposure	25	1.9% of measured traffic	1.4
Scour-critical bridge share	20	1.3%	2.5
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	452,481 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	20.2%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.3%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	8,496 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeFM over North River — 1,714 vehicles/day Oldest Listed BridgeFM over Painter Creek — built in 1900 All County BridgesBrowse every bridge record in Warren County.

Top Bridges to Watch in Warren County

Bridge	Reason	Condition	Daily Traffic	Year Built
Local Road over Branch Otter Creek	Poor condition + traffic exposure	Poor	288	1970
Pierce ST over Painter Creek	Poor condition + traffic exposure	Poor	11	1945
FM over North River	Poor condition + traffic exposure	Poor	1,714	1960
G-58 over Otter Creek	Poor condition + traffic exposure	Poor	996	1951
FM over Butcher Creek	Poor condition + traffic exposure	Poor	830	1952
FM over S River	Poor condition + traffic exposure	Poor	807	1949
FM over Short Creek	Poor condition + traffic exposure	Poor	717	1968
W Main ST over Small Natural Stream	Poor condition + traffic exposure	Poor	643	1959
FM over Stony Creek	Poor condition + traffic exposure	Poor	400	1958
R35 10th AVE over North River	Poor condition + traffic exposure	Poor	260	1962

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.