Nh 28a Mammoth RD over Cohas Brook
Fair Condition91 years old9,918 vehicles/day
Location
| State | New Hampshire |
| County | Hillsborough |
| Location | 1.3 Mi N Londonderry Tl |
| Carries | Nh 28a Mammoth RD |
| Crosses | Cohas Brook |
| Coordinates | 42.96024, -71.41744 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| 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 | 43.0 ft (13.1 m) |
| Deck Area | 183.4 sq m |
| Main Spans | 1 |
| Year Built | 1935 (reconstructed 2003) |
Traffic
| Avg Daily Traffic | 9,918 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 016101760011900 |