Northwest Gray Rd over Mayo Mill Branch
Calhoun County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Northwest Gray Rd over Mayo Mill Branch in Calhoun 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 2013, making it 12 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 36 of the 49 inventoried bridges in Calhoun County rated fair (73.5%); 2 (4.1%) are rated poor.
- 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 → (30.49189, -85.21108)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 27 ft |
| Location | 0.9 Miles West of SR73 |
| NBI structure number | 474063 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Calhoun County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR20 over Sutton Creek | 1952 | 11,500 | Fair |
| SR20 over Johnny H Bailey Creek | 1997 | 10,531 | Fair |
| SR20 over Apalachicola Relief | 1997 | 10,531 | Good |
| SR20 over Chipola River | 2015 | 6,600 | Good |
| SR 20 over Commander Creek | 1940 | 6,200 | Good |
| SR20 over Hogpen Branch | 1939 | 6,200 | Good |
All bridges nearby: Calhoun County, FL bridge conditions · every bridge in Calhoun County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.