Carroll County Bridge Report Card

Carroll County scores 82 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B82 / 100

Local infrastructure snapshot

Carroll County, Iowa

Carroll County has 249 bridges in the National Bridge Inventory, with 17 rated poor and 4 rated scour-critical. Its poor-condition share of 6.8% is at or below the 18.6% statewide average. Poor-condition bridges carry about 2,088 daily vehicle crossings.

249Total Bridges

17Poor (6.8%)

112Fair (45.0%)

4Scour-Critical

Quote-Ready Local Facts

6.8%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

2,088daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 1.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Carroll County a Bridge Condition Exposure Score of 82/100 (B). The county has 249 bridges in the National Bridge Inventory, including 17 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 2,088 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	6.8%	13.7
Poor-condition traffic exposure	25	1.4% of measured traffic	1.1
Scour-critical bridge share	20	1.6%	3.2
Average age vs national baseline	10	49 years vs 48 nationally	0.3
Traffic-data completeness	5	148,708 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	6.8%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.6%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	2,088 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeFM over Brushy Fork Creek — 650 vehicles/day Oldest Listed Bridge7th ST over Lateral #77 Dd #23 — built in 1900 All County BridgesBrowse every bridge record in Carroll County.

Top Bridges to Watch in Carroll County

Bridge	Reason	Condition	Daily Traffic	Year Built
Local over Brushy Fork Creek	Poor condition + traffic exposure	Poor	60	1925
FM over Brushy Fork Creek	Poor condition + traffic exposure	Poor	650	1964
East ST over Willow Creek	Poor condition + traffic exposure	Poor	580	1964
FM over Creek	Poor condition + traffic exposure	Poor	399	1939
Local over Stream	Poor condition + traffic exposure	Poor	120	1970
E35 (200th St) over Field Stream	Poor condition + traffic exposure	Poor	60	1946
Local over Willow Creek	Poor condition + traffic exposure	Poor	40	1900
Local over Middle Racoon River	Poor condition + traffic exposure	Poor	34	1900
Local over Field Stream	Poor condition + traffic exposure	Poor	29	1957
Local over Field Stream	Poor condition + traffic exposure	Poor	26	1913

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.