Structure C0201433FMUNNBI · Norfolk County, MA
Carries HWY Neponset ST over Water E Br Neponset Riv, W. Of R.r. Viaduct.
20 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 deck arch.
| State | Massachusetts |
| County | Norfolk |
| Location | W. Of R.r. Viaduct |
| Carries | HWY Neponset ST |
| Crosses | Water E Br Neponset Riv |
| Coordinates | 42.15870, -71.15464 |
| Material | Masonry |
| Design | Arch - Deck |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 60.0 ft (18.3 m) |
| Deck Area | 111.6 sq m |
| Main Spans | 1 |
| Year Built | 1850 (reconstructed 1929) |
| Avg Daily Traffic | 28,200 (2024) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | C0201433FMUNNBI |
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.