US 3 over West Branch Brook
Fair Condition99 years old1,054 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 0.6 Mi From Thornton Tl |
| Carries | US 3 |
| Crosses | West Branch Brook |
| Coordinates | 43.85138, -71.66690 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 90.9 ft (27.7 m) |
| Max Span | 85.0 ft (25.9 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 224.4 sq m |
| Main Spans | 1 |
| Year Built | 1927 |
Traffic
| Avg Daily Traffic | 1,054 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 003501170013500 |