Structure 16801160012000 · Hillsborough County, NH
Carries US 3 over Souhegan River, 0.03 Mi From Railroad AVE.
Set by its lowest-rated component: Deck and Substructure at 5 of 9.
How ratings work113 ft end to end, longest span 60 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a deck arch.
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.03 Mi From Railroad AVE |
| Carries | US 3 |
| Crosses | Souhegan River |
| Coordinates | 42.86066, -71.49313 |
| Material | Masonry |
| Design | Arch - Deck |
| Total Length | 112.9 ft (34.4 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 440.3 sq m |
| Main Spans | 2 |
| Year Built | 1921 (reconstructed 1934) |
| Avg Daily Traffic | 13,075 (2023) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 016801160012000 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.