Dunbarton Road over Black Brook
Good Condition37 years old3,159 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.2 Mi Goffstown Tl |
| Carries | Dunbarton Road |
| Crosses | Black Brook |
| Coordinates | 43.02532, -71.50466 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 40.0 ft (12.2 m) |
| Max Span | 32.2 ft (9.8 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 123.2 sq m |
| Main Spans | 1 |
| Year Built | 1989 |
Traffic
| Avg Daily Traffic | 3,159 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016100740004100 |