HWY Union ST over Water Merrimack River
Fair Condition138 years old24,050 vehicles/day
Location
| State | Massachusetts |
| County | Essex |
| Location | At Merrimac River |
| Carries | HWY Union ST |
| Crosses | Water Merrimack River |
| Coordinates | 42.70424, -71.15336 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Aluminum/Wrought Iron/Cast Iron |
| Design | Truss - Thru |
| Total Length | 609.9 ft (185.9 m) |
| Max Span | 130.9 ft (39.9 m) |
| Deck Width | 48.9 ft (14.9 m) |
| Deck Area | 2769.9 sq m |
| Main Spans | 5 |
| Year Built | 1888 (reconstructed 2012) |
Traffic
| Avg Daily Traffic | 24,050 (2019) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 123 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | L04003317DOTNBI |