Al - 53 (US 231) over Calvert Prong
Blount County, Alabama · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Al - 53 (US 231) over Calvert Prong in Blount County, Alabama, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2006, making it 19 years old at the 2025 inventory.
- It carries about 6,460 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 24 of the 178 inventoried bridges in Blount County rated good (13.5%); 14 (7.9%) 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.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (33.985, -86.50833)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 299 ft |
| Location | US 231 @ Calvert Prong |
| NBI structure number | 018885 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| 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 Alabama department of transportation.
Busiest bridges in Blount County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I - 65 over Al - 160 | 1999 | 50,947 | Fair |
| I65 over Branch | 1959 | 44,547 | Fair |
| I - 65 over Al - 3 (US 31) | 1998 | 42,750 | Fair |
| I65 over Branch | 1959 | 39,845 | Fair |
| I - 65 over Mulberry Fork Warrior Ri | 1995 | 39,680 | Fair |
| Al - 75 over Gurley Creek | 1968 | 11,640 | Fair |
All bridges nearby: Blount County, AL bridge conditions · every bridge in Blount County · Alabama bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.