I-93 SB over Ammonoosuc River
Fair Condition66 years old4,499 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 2.1 Mi Bethlehem Tl |
| Carries | I-93 SB |
| Crosses | Ammonoosuc River |
| Coordinates | 44.30459, -71.79675 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 282.2 ft (86 m) |
| Max Span | 145.0 ft (44.2 m) |
| Deck Width | 50.9 ft (15.5 m) |
| Deck Area | 1,333 sq m |
| Main Spans | 1 |
| Year Built | 1960 (reconstructed 1982) |
Traffic
| Avg Daily Traffic | 4,499 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 015301870006000 |