I 495 Upper Level over I 495 Lower Level
Poor Condition64 years old73,359 vehicles/day
Location
| State | Massachusetts |
| County | Essex |
| Location | At Merrimac River |
| Carries | I 495 Upper Level |
| Crosses | I 495 Lower Level |
| Coordinates | 42.70639, -71.13889 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 4 (Poor) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 1048.9 ft (319.7 m) |
| Max Span | 140.1 ft (42.7 m) |
| Deck Width | 93.2 ft (28.4 m) |
| Deck Area | 9079.5 sq m |
| Main Spans | 8 |
| Year Built | 1962 (reconstructed 2006) |
Traffic
| Avg Daily Traffic | 73,359 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 6 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | L040352XDDOTNBI |