SR 707 (Dixie Hwy) over St. Lucie River
Martin County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 707 (Dixie Hwy) over St. Lucie River in Martin 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 1964, making it 61 years old at the 2025 inventory.
- It carries about 11,400 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 34 of the 129 inventoried bridges in Martin County rated fair (26.4%); 1 (0.8%) 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 July 2024, on a 24-month routine inspection cycle.
- 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 → (27.20345, -80.26129)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel movable bascule |
| Length | about 1,229 ft |
| Location | 1/4Mi W of New Roosevelt |
| NBI structure number | 890003 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Martin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 (SR-9) over Drainage Ditch | 1987 | 111,500 | Good |
| Sr-9(i-95) over Drainage Ditch | 1987 | 103,500 | Good |
| I-95 (SR-9) over Hanson Grant Outlet | 1987 | 74,500 | Fair |
| SR 91 Tpk 137.25 over Drainage Ditch | 1957 | 59,900 | Good |
| SR91 N/S Tpk 138.1 over County Line Canal C-23 | 1957 | 59,900 | Fair |
| SR91 N/S Tpk 135.6 over Bessey Creek | 1957 | 59,900 | Fair |
All bridges nearby: Martin County, FL bridge conditions · every bridge in Martin County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.