Triple-barreled

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11th Street Bridge (Franklin County, Massachusetts)
Built 1915; rehabilitated 1996
Triple-barreled through truss bridge over Utility Canal on Eleventh Street in Montague
Open to traffic

Charlestown Bridge (Suffolk County, Massachusetts)
Built in 1900 to replace the Charles River Bridge which opened in 1786. It carried an elevated railway until it was demolished and re-routed in 1975.
Swing through truss bridge over Charles River on N. Washington Street in Boston
Open to traffic

Main Street Triple Bridge (Cerro Gordo County, Iowa)
Built 1897; Replaced ca. 1908
Lost Pratt through truss bridge over Willow Creek on Main Street and Mason City & Clear Lake Railway
Replaced by a new bridge

MNCW - Naugatuck River Bridge (Derby) (New Haven County, Connecticut)
Built 1903, rehabilitated 1965
Double-intersection Warren through truss bridge over Naugatuck River on MNCR Waterbury Branch
Open to traffic

Purple People Bridge (Hamilton County, Ohio)
First built 1872 as a Whipple through truss bridge; reconstructed 1897; railroad service discontinued 1987; closed to road traffic 2001; rehabilitated and reopened to pedestrians 2003
Five-span through truss bridge over the Ohio River formerly carrying the Louisville & Nashville Railroad) and US 27 between Cincinnati and Newport
Open to pedestrian traffic only

ST - Triple Bridge (Hillsborough County, New Hampshire)
Warren through truss bridge over Nashua River on Springfield Terminal Railway
Western truss still in use, other 2 abandoned.