Wilton Road over Souhegan River
Poor Condition88 years old1,866 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 260ft RTE 31 |
| Carries | Wilton Road |
| Crosses | Souhegan River |
| Coordinates | 42.77619, -71.80641 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 172.9 ft (52.7 m) |
| Max Span | 168.0 ft (51.2 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 516.5 sq m |
| Main Spans | 1 |
| Year Built | 1938 (reconstructed 1986) |
Traffic
| Avg Daily Traffic | 1,866 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 010400750011400 |