Main Street over Merrimack River Csx RD
Good Condition50 years old15,760 vehicles/day
Location
| State | New Hampshire |
| County | Merrimack |
| Location | 0.7 Mi N Jct US 3 |
| Carries | Main Street |
| Crosses | Merrimack River Csx RD |
| Coordinates | 43.09542, -71.46444 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 674.9 ft (205.7 m) |
| Max Span | 174.9 ft (53.3 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 2633.0 sq m |
| Main Spans | 5 |
| Year Built | 1976 |
Traffic
| Avg Daily Traffic | 15,760 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 012800800014800 |