Nh 31 over Blood Brook
Fair Condition89 years old4,387 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.2 Mi From Jct RTE 101 |
| Carries | Nh 31 |
| Crosses | Blood Brook |
| Coordinates | 42.82208, -71.76703 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Frame |
| Total Length | 45.9 ft (14 m) |
| Max Span | 40.0 ft (12.2 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 127.4 sq m |
| Main Spans | 1 |
| Year Built | 1937 |
Traffic
| Avg Daily Traffic | 4,387 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 027701020009500 |