Structure 5501000009900 · Sullivan County, NH
Carries Town House Road over Mill Brook, 2.4 Mi. From Jct. 12-a.
24 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 | Sullivan |
| Location | 2.4 Mi. From Jct. 12-a |
| Carries | Town House Road |
| Crosses | Mill Brook |
| Coordinates | 43.46719, -72.35035 |
| Material | Concrete |
| Design | Frame |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 36.7 ft (11.2 m) |
| Deck Area | 81.8 sq m |
| Main Spans | 1 |
| Year Built | 1940 |
| Avg Daily Traffic | 641 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | April 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 005501000009900 |
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.