Thorntons Ferry RD over Beaver Brook
Poor Condition56 years old356 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 3.2 Mi Fr Merrimack Tl |
| Carries | Thorntons Ferry RD |
| Crosses | Beaver Brook |
| Coordinates | 42.85892, -71.61628 |
Condition Ratings
| Overall Condition | Poor |
| Channel/Waterway | 5 (Fair) |
| Culvert | 1 (Imminent Failure) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 8.9 ft (2.7 m) |
| Deck Area | 37.2 sq m |
| Main Spans | 2 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 356 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 000701450010600 |