Cass County Bridge Report Card

Cass County scores 51 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F51 / 100

Local infrastructure snapshot

Cass County, Iowa

Cass County has 296 bridges in the National Bridge Inventory, with 104 rated poor and 11 rated scour-critical. Its poor-condition share of 35.1% is above the 18.6% statewide average. Poor-condition bridges carry about 7,848 daily vehicle crossings.

296Total Bridges

104Poor (35.1%)

112Fair (37.8%)

11Scour-Critical

Quote-Ready Local Facts

35.1%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

7,848daily vehicle crossings are on poor-condition bridges in the county.

11bridges are rated scour-critical, or 3.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Cass County a Bridge Condition Exposure Score of 51/100 (F). The county has 296 bridges in the National Bridge Inventory, including 104 in poor condition and 11 rated scour-critical. Poor-condition bridges carry about 7,848 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	35.1%	40.0
Poor-condition traffic exposure	25	2.2% of measured traffic	1.6
Scour-critical bridge share	20	3.7%	7.4
Average age vs national baseline	10	48 years vs 48 nationally	0.0
Traffic-data completeness	5	363,741 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	35.1%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	3.7%
Average Bridge Age	48 years
Poor-Condition Traffic Exposure	7,848 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeFM - Olive over Nishnabotna River — 1,524 vehicles/day Oldest Listed BridgeTruman RD over Drainage — built in 1900 All County BridgesBrowse every bridge record in Cass County.

Top Bridges to Watch in Cass County

Bridge	Reason	Condition	Daily Traffic	Year Built
FM - Olive over Nishnabotna River	Poor condition + traffic exposure	Poor	1,524	1961
Local/buck Crk over Waterway	Poor condition + traffic exposure	Poor	41	1967
Local - 665th over Jim Branch	Poor condition + traffic exposure	Poor	41	1978
Local - 730th over Waterway	Poor condition + traffic exposure	Poor	30	1958
FM - Boston over Crooked Creek	Poor condition + traffic exposure	Poor	29	1950
Local - 560th over Waterway	Poor condition + traffic exposure	Poor	15	1900
Akron RD over Stream	Poor condition + traffic exposure	Poor	11	1978
Local - 640th over Lone Tree Branch	Poor condition + traffic exposure	Poor	11	1987
Local - Akron over Small Stream	Poor condition + traffic exposure	Poor	11	1987
Local/730th LN over Waterway	Poor condition + traffic exposure	Poor	5	1995

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.