Shem Valley Road over Brock Brook
Good Condition96 years old96 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 0.04 Mi Knowles Hill RD |
| Carries | Shem Valley Road |
| Crosses | Brock Brook |
| Coordinates | 43.63877, -71.85643 |
Condition Ratings
| Overall Condition | Good |
| Deck | 9 (Excellent) |
| Superstructure | 9 (Excellent) |
| Substructure | 9 (Excellent) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 38.1 ft (11.6 m) |
| Max Span | 36.1 ft (11 m) |
| Deck Width | 20.3 ft (6.2 m) |
| Deck Area | 71.9 sq m |
| Main Spans | 1 |
| Year Built | 1930 (reconstructed 2024) |
Traffic
| Avg Daily Traffic | 96 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 000300960011200 |