C. M. Ingersoll

Chief Engineer of the Engineering Department of the New York, New Haven, and Hartford Railroad in the early 1900's.

East Street Railroad Bridge (Westwood) (Norfolk County, Massachusetts)
Built 1911
Pony/through plate girder bridge over East Street on MBTA Franklin Branch (MBTA Fairmount Line) in Islington, Westwood, Massachusetts
Open to railway traffic, and to vehicle and pedestrian traffic below

MBTA - Neponset River Bridge (Franklin Branch MP 17.82) (Norfolk County, Massachusetts)
Built 1902
Deck plate girder bridge over Neponset River on MBTA Franklin Branch (MBTA Franklin Line)
Open to railway traffic

MBTA - Plimpton Street Railroad Bridge (Norfolk County, Massachusetts)
Built 1905
Pony/through plate girder bridge over Plimpton Street on MBTA Franklin Branch (MBTA Franklin Line)
Open to railway traffic, and to vehicle traffic below

MNCW - Mianus River Bridge (Fairfield County, Connecticut)
Chief Engineer, 1903
Deck girder bridge over Mianus River on Metro-North New Haven Line/Amtrak NEC
Open to traffic