ST 1 A NB over Other Relief
Fair Condition75 years old29,117 vehicles/day
Location
| State | Massachusetts |
| County | Suffolk |
| Location | 1.4 Km NE Of Callahan |
| Carries | ST 1 A NB |
| Crosses | Other Relief |
| Coordinates | 42.37248, -71.03328 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 264.1 ft (80.5 m) |
| Max Span | 77.1 ft (23.5 m) |
| Deck Width | 55.8 ft (17 m) |
| Deck Area | 1368.5 sq m |
| Main Spans | 4 |
| Year Built | 1951 (reconstructed 2005) |
Traffic
| Avg Daily Traffic | 29,117 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | B1623539XDOTNBI |