Structure 3278 · Tolland County, CT
Carries Route 31 over Mill Brook, 1 Mi West Of Mansfield Tl.
Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.
How ratings work24 ft end to end, longest span 11 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 deck arch.
| State | Connecticut |
| County | Tolland |
| Location | 1 Mi West Of Mansfield Tl |
| Carries | Route 31 |
| Crosses | Mill Brook |
| Coordinates | 41.75894, -72.27618 |
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 11.2 ft (3.4 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 62.8 sq m |
| Main Spans | 2 |
| Year Built | 1870 |
| Avg Daily Traffic | 4,800 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 03278 |
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.