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
- Lake Harney Road over Underhill Slough in Volusia County, Florida, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- 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.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- 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.
View this bridge on a map → (28.7849, -81.0252)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 4 | 4 | Poor condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 39 ft |
| Location | 4 Mi South of Maytown Rd. |
| NBI structure number | 794050 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Volusia County
| 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 |
All bridges nearby: Volusia County, FL bridge conditions · every bridge in Volusia County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.