Carroll County Bridge Report Card

Carroll County scores 66 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D66 / 100

Local infrastructure snapshot

Carroll County, Illinois

Carroll County has 180 bridges in the National Bridge Inventory, with 26 rated poor and 1 rated scour-critical. Its poor-condition share of 14.4% is above the 9.5% statewide average. Poor-condition bridges carry about 6,200 daily vehicle crossings.

180Total Bridges

26Poor (14.4%)

96Fair (53.3%)

1Scour-Critical

Quote-Ready Local Facts

14.4%of county bridges are in poor condition, compared with 9.5% statewide and 6.7% nationally.

6,200daily 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 Carroll County a Bridge Condition Exposure Score of 66/100 (D). The county has 180 bridges in the National Bridge Inventory, including 26 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 6,200 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	14.4%	28.9
Poor-condition traffic exposure	25	5.3% of measured traffic	3.9
Scour-critical bridge share	20	0.6%	1.1
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	117,900 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	14.4%
State Poor-Condition Share	9.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.6%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	6,200 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeArgo Fay Road over Stream — 2,350 vehicles/day Oldest Listed BridgeE Keltner Road over E Fork Plum River — built in 1886 All County BridgesBrowse every bridge record in Carroll County.

Top Bridges to Watch in Carroll County

Bridge	Reason	Condition	Daily Traffic	Year Built
E Milledgeville RT over Elkhorn Creek	Poor condition + traffic exposure	Poor	1,050	1939
Argo Fay Road over Stream	Poor condition + traffic exposure	Poor	2,350	1937
Tr-38 (w Wacker RD over Plum River	Poor condition + traffic exposure	Poor	775	1977
Oil Valley School over East Johnson Creek	Poor condition + traffic exposure	Poor	200	1980
Vanbuskirk RD over Straddle Creek	Poor condition + traffic exposure	Poor	200	1982
Oil Valley School over Johnson Creek	Poor condition + traffic exposure	Poor	200	1986
Fas-2077 E Brkvl R over Otter Creek	Poor condition + traffic exposure	Poor	150	1970
West Doty Road over Drainage Ditch	Poor condition + traffic exposure	Poor	150	1984
Zion RD - Ch 16 over Camp Creek	Poor condition + traffic exposure	Poor	150	1994
Fulrath Mill RD over Carroll Creek	Poor condition + traffic exposure	Poor	125	1980

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.