Dubuque County Bridge Report Card

Dubuque County scores 83 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B83 / 100

Local infrastructure snapshot

Dubuque County, Iowa

Dubuque County has 346 bridges in the National Bridge Inventory, with 25 rated poor and 4 rated scour-critical. Its poor-condition share of 7.2% is at or below the 18.6% statewide average. Poor-condition bridges carry about 6,481 daily vehicle crossings.

346Total Bridges

25Poor (7.2%)

141Fair (40.8%)

4Scour-Critical

Quote-Ready Local Facts

7.2%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

6,481daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 1.2% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Dubuque County a Bridge Condition Exposure Score of 83/100 (B). The county has 346 bridges in the National Bridge Inventory, including 25 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 6,481 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	7.2%	14.5
Poor-condition traffic exposure	25	0.9% of measured traffic	0.7
Scour-critical bridge share	20	1.2%	2.3
Average age vs national baseline	10	35 years vs 48 nationally	0.0
Traffic-data completeness	5	743,459 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	7.2%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.2%
Average Bridge Age	35 years
Poor-Condition Traffic Exposure	6,481 vehicles/day

Bridges to Watch

Busiest Poor-Condition Bridge3rd AVE SW over N Fork Maquoketa River — 1,651 vehicles/day Oldest Listed BridgeFM over Small Stream — built in 1895 All County BridgesBrowse every bridge record in Dubuque County.

Top Bridges to Watch in Dubuque County

Bridge	Reason	Condition	Daily Traffic	Year Built
Local over Creek	Poor condition + traffic exposure	Poor	78	1928
FM over Creek	Poor condition + traffic exposure	Poor	39	1950
3rd AVE SW over N Fork Maquoketa River	Poor condition + traffic exposure	Poor	1,651	1967
Local over South Fork Catfish Creek	Poor condition + traffic exposure	Poor	756	1926
FM over Small	Poor condition + traffic exposure	Poor	540	1996
Wildwood DR over Bee Branch	Poor condition + traffic exposure	Poor	537	1970
Local over Catfish Creek	Poor condition + traffic exposure	Poor	530	1980
Dyersville East RD over Creek	Poor condition + traffic exposure	Poor	511	1964
FM over Creek	Poor condition + traffic exposure	Poor	490	1962
FM over Creek	Poor condition + traffic exposure	Poor	310	1920

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.