I-93 over Black Brook
Fair Condition67 years old5,250 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 2.8 Mi Sugarhill Tl |
| Carries | I-93 |
| Crosses | Black Brook |
| Coordinates | 44.20766, -71.71871 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 29.9 ft (9.1 m) |
| Deck Area | 216.6 sq m |
| Main Spans | 1 |
| Year Built | 1959 (reconstructed 1972) |
Traffic
| Avg Daily Traffic | 5,250 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 008700890010700 |