Nh 18 over Connecticut River
Poor Condition92 years old1,508 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | Nh-vt Sl |
| Carries | Nh 18 |
| Crosses | Connecticut River |
| Coordinates | 44.34264, -71.88890 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 4 (Poor) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 533.1 ft (162.5 m) |
| Max Span | 138.1 ft (42.1 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 1511.2 sq m |
| Main Spans | 5 |
| Year Built | 1934 (reconstructed 1980) |
Traffic
| Avg Daily Traffic | 1,508 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 8 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 015301090013400 |