US 4 Mechanic ST over Mascoma River
Poor Condition49 years old12,803 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 5.4 Mi From Hanover Tl |
| Carries | US 4 Mechanic ST |
| Crosses | Mascoma River |
| Coordinates | 43.63790, -72.27407 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 88.9 ft (27.1 m) |
| Max Span | 82.0 ft (25 m) |
| Deck Width | 72.5 ft (22.1 m) |
| Deck Area | 598.9 sq m |
| Main Spans | 1 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 12,803 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 014401000011000 |