Nassau County Bridge Report Card

Nassau County scores 85 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B85 / 100

Local infrastructure snapshot

Nassau County, Florida

Nassau County has 106 bridges in the National Bridge Inventory, with 3 rated poor and 5 rated scour-critical. Its poor-condition share of 2.8% is above the 2.8% statewide average. Poor-condition bridges carry about 2,661 daily vehicle crossings.

106Total Bridges

3Poor (2.8%)

51Fair (48.1%)

5Scour-Critical

Quote-Ready Local Facts

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

2,661daily vehicle crossings are on poor-condition bridges in the county.

5bridges are rated scour-critical, or 4.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Nassau County a Bridge Condition Exposure Score of 85/100 (B). The county has 106 bridges in the National Bridge Inventory, including 3 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 2,661 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	2.8%	5.7
Poor-condition traffic exposure	25	0.3% of measured traffic	0.2
Scour-critical bridge share	20	4.7%	9.4
Average age vs national baseline	10	48 years vs 48 nationally	0.1
Traffic-data completeness	5	1,053,027 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	2.8%
State Poor-Condition Share	2.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	4.7%
Average Bridge Age	48 years
Poor-Condition Traffic Exposure	2,661 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeCR 121 over Deep Creek — 2,500 vehicles/day Oldest Listed BridgeUs-1 SB (sr-15) over Braddock Creek — built in 1924 All County BridgesBrowse every bridge record in Nassau County.

Top Bridges to Watch in Nassau County

Bridge	Reason	Condition	Daily Traffic	Year Built
CR 121 over Deep Creek	Poor condition + traffic exposure	Poor	2,500	1949
Stokes Road over St. Marys River	Poor condition + traffic exposure	Poor	110	1978
Crandall Road over Mcqueen Swamp	Poor condition + traffic exposure	Poor	51	1973
Sr-115 over Cushing Creek	Scour-critical foundation rating	Fair	9,300	1948
Us-1 SB (sr-15) over Car Seat Creek	Scour-critical foundation rating	Fair	8,100	1924
Us-1 SB (sr-15) over Braddock Creek	Scour-critical foundation rating	Fair	8,050	1924
Us-17 (sr-5) over St. Marys River	Scour-critical foundation rating	Fair	4,600	1927
Hill Road over Little Mills Creek	Scour-critical foundation rating	Fair	31	1931
I-95 NB (sr-9) over St. Marys River	High traffic	Fair	75,637	1971
I-95 (sr-9) over Lofton Creek	High traffic	Fair	56,500	1968

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.