US-1 (main St.) over St. Johns River
Duval County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-1 (main St.) over St. Johns River in Duval County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1941, making it 84 years old at the 2025 inventory.
- It carries about 13,800 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 295 of the 829 inventoried bridges in Duval County rated fair (35.6%); 14 (1.7%) 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 August 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (30.3221, -81.65863)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel movable lift |
| Length | about 1,680 ft |
| Location | US-1 over St. Johns River |
| NBI structure number | 720022 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Duval County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 (SR-9) over US-1 | 2016 | 180,000 | Good |
| I-95 (SR-9)NB & SB over San Marco/palm/st J Riv. | 2003 | 170,000 | Good |
| I-95 (SR-9) over St. Johns River | 2003 | 170,000 | Good |
| I-95 (SR-9) over Riverside Ave/st J River | 2003 | 170,000 | Good |
| I-95 (SR-9) over Bowden Rd. | 1965 | 166,000 | Good |
| SR-202 over Buckhead Branch | 1978 | 161,000 | Fair |
All bridges nearby: Duval County, FL bridge conditions · every bridge in Duval County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.