Structure 18601370006200 · Hillsborough County, NH
Carries Lower Ashby Road over Souhegan River, 0.2 Mi Fr Nh RTE 123a.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.
How ratings work25 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 rigid-frame bridge.
| State | New Hampshire |
| County | Hillsborough |
| Location | 0.2 Mi Fr Nh RTE 123a |
| Carries | Lower Ashby Road |
| Crosses | Souhegan River |
| Coordinates | 42.72743, -71.84807 |
| Material | Concrete |
| Design | Frame |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 24.0 ft (7.3 m) |
| Deck Width | 26.9 ft (8.2 m) |
| Deck Area | 62.3 sq m |
| Main Spans | 1 |
| Year Built | 2006 |
| Avg Daily Traffic | 1,167 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 018601370006200 |
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.