Mission ST over South 21st Street
Poor Condition87 years old650 vehicles/day
Location
| State | Pennsylvania |
| County | Allegheny |
| Location | 061 Mission ST West |
| Carries | Mission ST |
| Crosses | South 21st Street |
| Coordinates | 40.42363, -79.97688 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 4 (Poor) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 394.0 ft (120.1 m) |
| Max Span | 160.1 ft (48.8 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 1321.1 sq m |
| Main Spans | 3 |
| Year Built | 1939 (reconstructed 1982) |
Traffic
| Avg Daily Traffic | 650 (2020) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 000000000002428 |