Michigan Central Bridge Company ended in 1898.
Michigan Central Railway Bridge was created in 1925.
Michigan Avenue Bridge was created in 1920.
The Niagara Cantilever Bridge or Michigan Central Railway Cantilever Bridge
King Bridge Company was created in 1858.
Railroad Bridge Company was created in 1853.
Keystone Bridge Company was created in 1865.
Quincy Bridge Company was created in 1866.
Sibley Bridge Company was created in 1887.
American Bridge Company was created in 1900.
Keithsburg Bridge Company was created in 1881.
Illinois Central Missouri River Bridge was created in 1893.