Castle Shannon Blv over Saw Mill Run
Fair Condition126 years old13,866 vehicles/day
Location
| State | Pennsylvania |
| County | Allegheny |
| Location | 300 NW Of SR 88 |
| Carries | Castle Shannon Blv |
| Crosses | Saw Mill Run |
| Coordinates | 40.36514, -80.02383 |
Condition Ratings
| Overall Condition | Fair |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Masonry |
| Design | Arch - Deck |
| Total Length | 23.0 ft (7 m) |
| Max Span | 18.0 ft (5.5 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 95.9 sq m |
| Main Spans | 1 |
| Year Built | 1900 (reconstructed 1920) |
Traffic
| Avg Daily Traffic | 13,866 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000001762 |