Monroe County Bridge Report Card

Monroe County scores 73 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C73 / 100

Local infrastructure snapshot

Monroe County, Florida

Monroe County has 98 bridges in the National Bridge Inventory, with 5 rated poor and 8 rated scour-critical. Its poor-condition share of 5.1% is above the 2.8% statewide average. Poor-condition bridges carry about 9,480 daily vehicle crossings.

98Total Bridges

5Poor (5.1%)

61Fair (62.2%)

8Scour-Critical

Quote-Ready Local Facts

5.1%of county bridges are in poor condition, compared with 2.8% statewide and 6.7% nationally.

9,480daily vehicle crossings are on poor-condition bridges in the county.

8bridges are rated scour-critical, or 8.2% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Monroe County a Bridge Condition Exposure Score of 73/100 (C). The county has 98 bridges in the National Bridge Inventory, including 5 in poor condition and 8 rated scour-critical. Poor-condition bridges carry about 9,480 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	5.1%	10.2
Poor-condition traffic exposure	25	1.0% of measured traffic	0.7
Scour-critical bridge share	20	8.2%	16.3
Average age vs national baseline	10	46 years vs 48 nationally	0.0
Traffic-data completeness	5	962,469 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	5.1%
State Poor-Condition Share	2.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	8.2%
Average Bridge Age	46 years
Poor-Condition Traffic Exposure	9,480 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeCard Sound Road over Tubbys Creek — 3,182 vehicles/day Oldest Listed BridgeRamp To Pigeon Key over Pigeon Key — built in 1938 All County BridgesBrowse every bridge record in Monroe County.

Top Bridges to Watch in Monroe County

Bridge	Reason	Condition	Daily Traffic	Year Built
Card Sound Road over Tubbys Creek	Poor condition + traffic exposure	Poor	3,182	1969
Card Sound Road over Mosquito Creek	Poor condition + traffic exposure	Poor	3,182	1969
Cr-941 Boca Chica over Similar Sound Local Cnl	Poor condition + traffic exposure	Poor	2,230	1957
Cr939 Sugarloaf B. over Un-named Channel	Poor condition + traffic exposure	Poor	592	1961
117th Street over Vaca Channel #2	Poor condition + traffic exposure	Poor	294	1967
Card Sound Road over I.c.w.w	Scour-critical foundation rating	Fair	3,157	1969
Duck Key Drive over Toms Harbor Channel	Scour-critical foundation rating	Fair	1,700	1967
Watson Road over Bogie Channel	Scour-critical foundation rating	Fair	1,300	1967
Duck Key Drive over Duck Key Channel	Scour-critical foundation rating	Fair	830	1955
112th Street over Caloosa Channel	Scour-critical foundation rating	Fair	593	1965

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.