Nh 1b over Little Harbor
Poor Condition84 years old3,359 vehicles/day
Location
| State | New Hampshire |
| County | Rockingham |
| Location | 1.1 Mi Jct RT 1-a |
| Carries | Nh 1b |
| Crosses | Little Harbor |
| Coordinates | 43.05846, -70.72912 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 3 (Serious) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Movable - Bascule |
| Total Length | 253.6 ft (77.3 m) |
| Max Span | 43.0 ft (13.1 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 726.6 sq m |
| Main Spans | 1 |
| Year Built | 1942 (reconstructed 1975) |
Traffic
| Avg Daily Traffic | 3,359 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 8 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 018100660007100 |