Bridge conditions in Martin County, Florida
129 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Martin County tracks close to typical: 1 of its 129 inventoried bridges (0.8%) are rated poor, against a national rate of about 7%.
- 1 of the 129 bridges in Martin County, Florida, are rated in poor condition (0.8%) in the 2025 National Bridge Inventory, as of .
- 94 bridges (72.9%) are rated good and 34 (26.4%) fair.
- The median Martin County bridge was built in 1986.
- The busiest poor-rated bridge is SE County Line Rd over N Fork Loxahatchee River (built 1974), carrying about 3,500 vehicles a day.
Good 72.9% · Fair 26.4% · Poor 0.8% of 129 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SE County Line Rd over N Fork Loxahatchee River | 1974 | 3,500 | Poor |
Busiest bridges in the 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 |
| SB I-95 (SR 9) over CR 708 | 1986 | 55,750 | Good |
| NB I-95 (SR-9) over CR 708 | 1986 | 55,750 | Good |
| SR-91 Tpk 134.1 over Danforth Creek | 1957 | 52,700 | Good |
| SR91 Tpk NS 118.45 over Drainage Canal | 1957 | 52,700 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Florida: Florida bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.