Tunnel Brook Road over Wild Ammonoosuc River
Poor Condition126 years old52 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 0.6 Mi N. Benton T.l. |
| Carries | Tunnel Brook Road |
| Crosses | Wild Ammonoosuc River |
| Coordinates | 44.09189, -71.82675 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 35.1 ft (10.7 m) |
| Max Span | 32.2 ft (9.8 m) |
| Deck Width | 20.3 ft (6.2 m) |
| Deck Area | 66.3 sq m |
| Main Spans | 1 |
| Year Built | 1900 (reconstructed 1959) |
Traffic
| Avg Daily Traffic | 52 (2023) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 8 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 007200840005600 |