Al 171 over Unknown Branch
Fair Condition47 years old3,360 vehicles/day
Location
| State | Alabama |
| County | Tuscaloosa |
| Location | 1.5 Mi N Mt Olive RD |
| Carries | Al 171 |
| Crosses | Unknown Branch |
| Coordinates | 33.32383, -87.65700 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Channel Beam |
| Total Length | 67.9 ft (20.7 m) |
| Max Span | 34.1 ft (10.4 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 178.0 sq m |
| Main Spans | 4 |
| Year Built | 1979 |
Traffic
| Avg Daily Traffic | 3,360 (2017) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 012226 |