Tirrell Hill Road over Black Brook
Poor Condition32 years old1,387 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 1.9mi Fr Goffstwn Back RD |
| Carries | Tirrell Hill Road |
| Crosses | Black Brook |
| Coordinates | 43.04272, -71.52389 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 7 (Good) |
| Superstructure | 4 (Poor) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 42.0 ft (12.8 m) |
| Max Span | 37.1 ft (11.3 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 93.4 sq m |
| Main Spans | 1 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 1,387 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 009501620014100 |