Nh 12a over Great Brook
Fair Condition77 years old957 vehicles/day
Location
| State | New Hampshire |
| County | Sullivan |
| Location | 1.0 Mi From Charlestown T |
| Carries | Nh 12a |
| Crosses | Great Brook |
| Coordinates | 43.16519, -72.39086 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 55.1 ft (16.8 m) |
| Max Span | 47.9 ft (14.6 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 179.8 sq m |
| Main Spans | 1 |
| Year Built | 1949 (reconstructed 1988) |
Traffic
| Avg Daily Traffic | 957 (2023) |
| Truck Traffic | 4% |
| 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 | 014301170010100 |