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Lake Harney Road over Underhill Slough

Volusia County, Florida · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Lake Harney Road over Underhill Slough in Volusia County, Florida, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
It was built in 1948, making it 77 years old at the 2025 inventory.
It carries about 130 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 6 of the 240 inventoried bridges in Volusia County rated poor (2.5%); 6 (2.5%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	4	Poor condition

Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.

Bridge	Built	Vehicles/day	Condition
I-95 over SR-40	2006	82,500	Good
I-95 over Tyson Creek	1964	78,500	Fair
I-95 over Beamers Canal	1966	78,500	Fair
I-4 WB over US-17-92 -St Johns River	2002	69,000	Fair
I-4 EB over US-17-92-St Johns River	2003	69,000	Fair
I-4 WB over Dirksen Drive	1959	65,000	Fair