South Twelfth ST over Norfolk Southern Rr
Fair Condition125 years old3,000 vehicles/day
Location
| State | Pennsylvania |
| County | Allegheny |
| Location | 104 S 12th ST Bridge |
| Carries | South Twelfth ST |
| Crosses | Norfolk Southern Rr |
| Coordinates | 40.42567, -79.98562 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 75.1 ft (22.9 m) |
| Max Span | 70.9 ft (21.6 m) |
| Deck Width | 40.4 ft (12.3 m) |
| Deck Area | 281.7 sq m |
| Main Spans | 1 |
| Year Built | 1901 (reconstructed 1994) |
Traffic
| Avg Daily Traffic | 3,000 (2020) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000002454 |