Structure 3701510012300 · Rockingham County, NH
Carries Old Deerfield Road over Brook, 185 Ft From Nh RTE 43.
Set by its lowest-rated component: Deck and Superstructure at 4 of 9.
How ratings work24 ft end to end, longest span 10 ft. 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 slab bridge.
| State | New Hampshire |
| County | Rockingham |
| Location | 185 Ft From Nh RTE 43 |
| Carries | Old Deerfield Road |
| Crosses | Brook |
| Coordinates | 43.07404, -71.27869 |
| Material | Masonry |
| Design | Slab |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 21.3 ft (6.5 m) |
| Deck Area | 47.5 sq m |
| Main Spans | 2 |
| Year Built | 1920 |
| Avg Daily Traffic | 250 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 16 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 003701510012300 |
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.