Johnson Hill Road over West Branch Brook
Poor Condition76 years old96 vehicles/day
Location
| State | New Hampshire |
| County | Merrimack |
| Location | 1.5 Mi Marshall Hill RD |
| Carries | Johnson Hill Road |
| Crosses | West Branch Brook |
| Coordinates | 43.26257, -71.98884 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 2 (Critical) |
| Superstructure | 4 (Poor) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 26.9 ft (8.2 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 12.1 ft (3.7 m) |
| Deck Area | 30.3 sq m |
| Main Spans | 1 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 96 (2023) |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 002801040014100 |