US 4 over Mill Brook
Fair Condition78 years old1,707 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 1.25 Mi From Danbury Tl |
| Carries | US 4 |
| Crosses | Mill Brook |
| Coordinates | 43.56515, -71.92729 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Frame |
| Total Length | 26.9 ft (8.2 m) |
| Max Span | 24.0 ft (7.3 m) |
| Deck Width | 37.7 ft (11.5 m) |
| Deck Area | 94.3 sq m |
| Main Spans | 1 |
| Year Built | 1948 |
Traffic
| Avg Daily Traffic | 1,707 (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 | 009901760008600 |