Delaware Bridge Co.

Atwells Avenue Bridge (Providence County, Rhode Island)
Built 1875
Pony truss bridge over Woonasquatucket River on Atwells Avenue, oldest surviving metal bridge in the state.
Open to traffic

PRR - Rockville Bridge (Old) (Dauphin County, Pennsylvania)
Built 1877
Lost Howe deck truss bridge over Susquehanna River on Pennsylvania Railroad
Replaced by a new bridge

PSN - Stony Brook Glen Bridge (Old) (Steuben County, New York)
Built 1883
Lost Deck truss bridge over Stony Brook Glen on former Pittsburg, Shawmut & Northern Railroad south of Dansville
Replaced by a new bridge