I-93 SB over Nh175
Fair Condition54 years old7,166 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 2.57 Mi Thornton Tl |
| Carries | I-93 SB |
| Crosses | Nh175 |
| Coordinates | 43.97038, -71.67514 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 85.0 ft (25.9 m) |
| Max Span | 80.1 ft (24.4 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 354.8 sq m |
| Main Spans | 1 |
| Year Built | 1972 (reconstructed 2009) |
Traffic
| Avg Daily Traffic | 7,166 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 028402030008100 |