US 4 over Crystal Lake Brook
Good Condition85 years old7,633 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 0.6 Mi From Enfield Tl |
| Carries | US 4 |
| Crosses | Crystal Lake Brook |
| Coordinates | 43.64718, -72.10268 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 76.1 ft (23.2 m) |
| Max Span | 25.9 ft (7.9 m) |
| Deck Width | 46.6 ft (14.2 m) |
| Deck Area | 329.4 sq m |
| Main Spans | 3 |
| Year Built | 1941 (reconstructed 1993) |
Traffic
| Avg Daily Traffic | 7,633 (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 | 003600960003900 |