Lost 1870

Old Chain Bridge (Washington, District of Columbia)
Lost to flooding 1870
Lost Howe through truss bridge over Potomac River and Chesapeake and Ohio Canal on Chain Bridge Road
No longer exists

Port Trevorton Railroad Bridge (Snyder County, Pennsylvania)
Built 1853-55 to connect coal mines on east side of river with Pennsylvania Canal on west side; abandoned August 1870 and later demolished
Lost Long through truss bridge over Susquehanna River on Trevorton, Mahanoy & Susquehanna Railroad
Removed