Nh 11 over West Alton Brook
Fair Condition103 years old5,130 vehicles/day
Location
| State | New Hampshire |
| County | Belknap |
| Location | 1.9 Mi SE Gilford Tl |
| Carries | Nh 11 |
| Crosses | West Alton Brook |
| Coordinates | 43.54166, -71.30098 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 35.8 ft (10.9 m) |
| Deck Area | 73.0 sq m |
| Main Spans | 1 |
| Year Built | 1923 |
Traffic
| Avg Daily Traffic | 5,130 (2023) |
| Truck Traffic | 7% |
| 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 | 000600960028700 |