SR-121 over St.marys Crk. Tributary
Baker County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR-121 over St.marys Crk. Tributary in Baker County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1940 and reconstructed in 1988, making it 85 years old at the 2025 inventory.
- It carries about 8,800 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 58 of the 92 inventoried bridges in Baker County rated fair (63.0%); 9 (9.8%) 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 December 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 → (30.21342, -82.15346)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 20 ft |
| Location | 3.7 Mi. S. of I-10 |
| NBI structure number | 270018 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Baker County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-10 (SR-8) over Prong of St.marys River | 1961 | 32,500 | Fair |
| I-10 SR-8 over Turkey Creek | 1961 | 29,000 | Fair |
| I-10 SR-8 over Hells Bay | 1961 | 27,000 | Fair |
| I-10 (SR-8) over Cypress Branch | 1962 | 25,243 | Good |
| I-10 WB SR-8 over Csxrr Removed | 1960 | 20,000 | Fair |
| I-10 EB SR-8 over SR-228 | 1960 | 20,000 | Fair |
All bridges nearby: Baker County, FL bridge conditions · every bridge in Baker County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.