Tripoli Road over Mad River
Fair Condition58 years old415 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | .29 Mi. From Jct. Rte. 49 |
| Carries | Tripoli Road |
| Crosses | Mad River |
| Coordinates | 43.94586, -71.51272 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 168.0 ft (51.2 m) |
| Max Span | 73.2 ft (22.3 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 568.3 sq m |
| Main Spans | 3 |
| Year Built | 1968 (reconstructed 2000) |
Traffic
| Avg Daily Traffic | 415 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 026601260010300 |