National Bridge & Iron Works
Elm Street Bridge (Windsor County, Vermont)
Built 1870Parker pony truss bridge over Ottauquechee River on VT 12 (Elm Street)Open to traffic
Lower Rollstone Street Bridge (Worcester County, Massachusetts)
Built 1870Parker pony truss bridge over North Nashua River on Lower Rollstone StreetClosed 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 ParkOpen to pedestrians