Nh 31 over Souhegan River
Good Condition55 years old1,924 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.1 Mi. From Jct. Nh 101 |
| Carries | Nh 31 |
| Crosses | Souhegan River |
| Coordinates | 42.84394, -71.73952 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 79.1 ft (24.1 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 40.0 ft (12.2 m) |
| Deck Area | 294.0 sq m |
| Main Spans | 1 |
| Year Built | 1971 (reconstructed 2014) |
Traffic
| Avg Daily Traffic | 1,924 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 027701290012600 |