US 1 Sb/uppr Deck over US 1 Nb/chel Lwr Deck
Poor Condition76 years old41,655 vehicles/day
Location
| State | Massachusetts |
| County | Suffolk |
| Location | Chel Appr Up |
| Carries | US 1 Sb/uppr Deck |
| Crosses | US 1 Nb/chel Lwr Deck |
| Coordinates | 42.39048, -71.04102 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 4 (Poor) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 3349.1 ft (1020.8 m) |
| Max Span | 103.0 ft (31.4 m) |
| Deck Width | 41.7 ft (12.7 m) |
| Deck Area | 12964.2 sq m |
| Main Spans | 36 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 41,655 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 3 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | B160174X0DOTNBI |