US 3 over Bog Brook
Poor Condition97 years old1,193 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 1.2 Mi From Plymouth Tl |
| Carries | US 3 |
| Crosses | Bog Brook |
| Coordinates | 43.79822, -71.67386 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 40.0 ft (12.2 m) |
| Max Span | 34.1 ft (10.4 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 103.7 sq m |
| Main Spans | 1 |
| Year Built | 1929 |
Traffic
| Avg Daily Traffic | 1,193 (2023) |
| Truck Traffic | 4% |
| 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 | 003501080005800 |