Damaged by flooding

NH - Quinebaug River Bridge (Windham County, Connecticut)
Two southern spans lost to 1955 floods, line abandoned 1959, remainder demolished at a later point
Lost Deck plate girder bridge over Quinebaug River, River Road, and Kennedy Drive on NYNH&H Midland Division
Replaced by a pedestrian bridge

Okoboji Bridge (Dickinson County, Iowa)
Built in 1909 over the strait between West and East Okoboji Lakes, replaced in 1926 but the truss span was relocated to its present spot.
Pony truss bridge over a branch of Little Sioux River on 180th Avenue
In storage

South Front Street Bridge (Union County, New Jersey)
Built 1922; rehabilitated 1974; mostly destroyed by flash flooding 2018
Lost single-leaf truss bascule bridge over Elizabeth River on South Front Street in Elizabeth
Bascule span and truss superstructure destroyed by flash flooding on April 16, 2018. Some substructure elements reportedly remain damaged but intact