The Canal Street railroad bridge is a two-track vertical lift bridge
across the South Branch of the Chicago River. It was built as Pennsylvania Lift
Bridge No. 458 for the Pennsylvania Railroad in 1914 on a design by
the firm of Waddell and Harrington.
The main span is 273 feet long and can be lifted on two 185-foot towers to
a height 130 feet above the river. The main span is balanced by two 179-ton
counterweights. It was designated a Chicago Landmark in 2007 and is
owned by Amtrak.
Journal of the Western Society of Engineers, 1915, Volume 20,