SR-51 over Suwannee River Relief
Suwannee County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR-51 over Suwannee River Relief in Suwannee County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1947, making it 78 years old at the 2025 inventory.
- It carries about 4,900 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 15 of the 37 inventoried bridges in Suwannee County rated fair (40.5%); 2 (5.4%) 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 March 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.
- 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 → (30.10509, -83.17122)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 131 ft |
| Location | 0.3 Mi.n.of Hal Adams Brg |
| NBI structure number | 370005 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Suwannee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 SB (SR-93) over Suwannee River Overflow | 1962 | 20,000 | Good |
| I-75 NB (SR-93) over Suwannee River Overflow | 1962 | 20,000 | Good |
| I-75 SB (SR-93) over Suwannee River | 1962 | 20,000 | Fair |
| I-75 NB (SR-93) over Suwannee River | 1962 | 20,000 | Fair |
| I-10 WB (SR-8) over Rocky Creek | 1968 | 16,438 | Fair |
| I-10 EB (SR-8) over Rocky Creek | 1968 | 16,438 | Fair |
All bridges nearby: Suwannee County, FL bridge conditions · every bridge in Suwannee County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.