US-129 (SR-51) over I-75 (SR-93)
Hamilton County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-129 (SR-51) over I-75 (SR-93) in Hamilton County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 4,800 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 38 of the 61 inventoried bridges in Hamilton County rated fair (62.3%); 1 (1.6%) 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 November 2023, on a 24-month routine inspection cycle.
- 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 → (30.44889, -82.93299)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 244 ft |
| Location | 4 Mi N OF CR-132 |
| NBI structure number | 320011 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Hamilton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 (SR-93) over Tiger Creek | 1961 | 40,000 | Fair |
| I-75 (SR-93) over Dry Creek | 1961 | 40,000 | Fair |
| I-75 (SR-93) over Camp Branch Creek | 1962 | 40,000 | Good |
| I-75 SB SR-93 over Alapaha River | 1962 | 21,500 | Fair |
| I-75 SB (SR-93) over SR-6 | 1961 | 21,500 | Fair |
| I-75 NB SR-93 over Alapaha River | 1962 | 21,500 | Fair |
All bridges nearby: Hamilton County, FL bridge conditions · every bridge in Hamilton County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.