National Bridge & Iron Works

Elm Street Bridge (Windsor County, Vermont)
Built 1870
Parker pony truss bridge over Ottauquechee River on VT 12 (Elm Street)
Open to traffic

Lower Rollstone Street Bridge (Worcester County, Massachusetts)
Built 1870
Parker pony truss bridge over North Nashua River on Lower Rollstone Street
Closed to all traffic

Memorial Beach Park Bridge (Worcester County, Massachusetts)
Parker pony truss bridge over a feeder stream that flows into Webster Lake on a pedestrian walkway in Memorial Beach Park
Open to pedestrians