Nh 9(loudon Road) over Merrimack River
Poor Condition60 years old23,721 vehicles/day
Location
| State | New Hampshire |
| County | Merrimack |
| Location | 0.1 Mi East Jct I-93 |
| Carries | Nh 9(loudon Road) |
| Crosses | Merrimack River |
| Coordinates | 43.20898, -71.53034 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 3 (Serious) |
| Superstructure | 5 (Fair) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 524.9 ft (160 m) |
| Max Span | 144.0 ft (43.9 m) |
| Deck Width | 77.1 ft (23.5 m) |
| Deck Area | 3,760 sq m |
| Main Spans | 4 |
| Year Built | 1966 (reconstructed 1996) |
Traffic
| Avg Daily Traffic | 23,721 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 005201630011100 |