Nh 18 over Lafayette Brook
Good Condition94 years old593 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 2.7 Mi From Sugar Hill Tl |
| Carries | Nh 18 |
| Crosses | Lafayette Brook |
| Coordinates | 44.20536, -71.72301 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Single/Spread |
| Total Length | 56.1 ft (17.1 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 29.2 ft (8.9 m) |
| Deck Area | 152.2 sq m |
| Main Spans | 1 |
| Year Built | 1932 (reconstructed 2019) |
Traffic
| Avg Daily Traffic | 593 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 008700890009900 |