St. Johns County Bridge Report Card

St. Johns County scores 94 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A94 / 100

Local infrastructure snapshot

St. Johns County, Florida

St. Johns County has 141 bridges in the National Bridge Inventory, with 2 rated poor and 1 rated scour-critical. Its poor-condition share of 1.4% is at or below the 2.8% statewide average. Poor-condition bridges carry about 59,500 daily vehicle crossings.

141Total Bridges

2Poor (1.4%)

53Fair (37.6%)

1Scour-Critical

Quote-Ready Local Facts

1.4%of county bridges are in poor condition, compared with 2.8% statewide and 6.7% nationally.

59,500daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives St. Johns County a Bridge Condition Exposure Score of 94/100 (A). The county has 141 bridges in the National Bridge Inventory, including 2 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 59,500 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	1.4%	2.8
Poor-condition traffic exposure	25	2.0% of measured traffic	1.5
Scour-critical bridge share	20	0.7%	1.4
Average age vs national baseline	10	38 years vs 48 nationally	0.0
Traffic-data completeness	5	2,944,232 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	1.4%
State Poor-Condition Share	2.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.7%
Average Bridge Age	38 years
Poor-Condition Traffic Exposure	59,500 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUs-1 (sr-5) over Oyster Creek — 43,000 vehicles/day Oldest Listed BridgeCR 13a over Branch Of Six Mile Creek — built in 1926 All County BridgesBrowse every bridge record in St. Johns County.

Top Bridges to Watch in St. Johns County

Bridge	Reason	Condition	Daily Traffic	Year Built
Us-1 (sr-5) over Oyster Creek	Poor condition + traffic exposure	Poor	43,000	1958
Us-1 Bus. & Sr-5a over San Sebastian River	Poor condition + traffic exposure	Poor	16,500	1949
Dot Road over Red House Branch	Scour-critical foundation rating	Fair	301	1991
I-95 (sr-9) over Sampson Creek	High traffic	Fair	117,000	1966
I-95 (sr-9) over 12 Mile Swamp	High traffic	Good	101,500	1966
I-95 (sr-9) over 12 Mile Swamp	High traffic	Fair	101,500	1966
I-95 (sr-9) over Canal Creek	High traffic	Fair	101,500	1967
I-95 (sr-9) over Turnbull Creek	High traffic	Fair	96,500	1966
I-95 (sr-9) over Trestle Bay Swamp	High traffic	Fair	90,000	1966
I-95 (sr-9) over Bailey Creek	High traffic	Fair	74,500	1966

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.