ST 1 A/on Ramp over Other Relief
Fair Condition75 years old15,000 vehicles/day
Location
| State | Massachusetts |
| County | Suffolk |
| Location | 1.4 Km NE Of Sumner Tun |
| Carries | ST 1 A/on Ramp |
| Crosses | Other Relief |
| Coordinates | 42.37930, -71.02569 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 425.9 ft (129.8 m) |
| Max Span | 87.9 ft (26.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 1181.2 sq m |
| Main Spans | 6 |
| Year Built | 1951 (reconstructed 1977) |
Traffic
| Avg Daily Traffic | 15,000 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | B1623639MDOTNBI |