I-376 over Commercial St. & Nine Mi
Fair Condition76 years old65,232 vehicles/day
Location
| State | Pennsylvania |
| County | Allegheny |
| Location | Commercial Street Bridge |
| Carries | I-376 |
| Crosses | Commercial St. & Nine Mi |
| Coordinates | 40.42556, -79.90508 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 862.9 ft (263 m) |
| Max Span | 175.9 ft (53.6 m) |
| Deck Width | 75.5 ft (23 m) |
| Deck Area | 6,049 sq m |
| Main Spans | 3 |
| Year Built | 1950 (reconstructed 2007) |
Traffic
| Avg Daily Traffic | 65,232 (2024) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 000000000001167 |