Mill Street over Souhegan River
Fair Condition101 years old1,043 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.17 Mi W Jct Nh 31 |
| Carries | Mill Street |
| Crosses | Souhegan River |
| Coordinates | 42.76875, -71.81020 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Masonry |
| Design | Arch - Deck |
| Total Length | 43.0 ft (13.1 m) |
| Max Span | 35.1 ft (10.7 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 119.2 sq m |
| Main Spans | 1 |
| Year Built | 1925 |
Traffic
| Avg Daily Traffic | 1,043 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 010400730010400 |