St Clair Co Hwy 6 over Big Black Creek
St. Clair County, Alabama · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- St Clair Co Hwy 6 over Big Black Creek in St. Clair County, Alabama, 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 1956, making it 69 years old at the 2025 inventory.
- It carries about 3,373 vehicles a day (traffic count year 2006).
- Its listed owner is the county highway agency.
- It is one of 132 of the 183 inventoried bridges in St. Clair County rated fair (72.1%); 3 (1.6%) 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 → (33.67485, -86.49339)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 54 ft |
| Location | 1 0 SW Margaret |
| NBI structure number | 005579 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alabama department of transportation.
Busiest bridges in St. Clair County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 20 over Little Cahaba River | 1961 | 65,150 | Fair |
| I - 20 over Al - 4 ( US 78) | 2005 | 53,023 | Fair |
| I20 over Head Springs | 1961 | 51,890 | Fair |
| I - 20 over Kelly Creek | 2010 | 51,890 | Good |
| I - 20 over Cook Springs Road | 2010 | 51,890 | Good |
| I - 20 over Cane Creek | 1991 | 51,010 | Fair |
All bridges nearby: St. Clair County, AL bridge conditions · every bridge in St. Clair County · Alabama bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.