Railroad Bridge Company was created in 1853.
Quincy Memorial Bridge was created in 1928.
Railroad Bridge Company ended in 1866.
Quincy Railroad Bridge Company ended in 1903.
Beverly Railroad Bridge was created in 1909.
Wilsonville railroad bridge was created in 1975.
Anacostia Railroad Bridge was created in 1872.
New Railroad Bridge was created in 1979.
Columbia Railroad Bridge was created in 1920.
Struve Railroad Bridge was created in 1870.
Fairmont Railroad Bridge was created in 1912.
Glasgow Railroad Bridge was created in 1879.
Louisiana Railroad Bridge was created in 1873.