Lake Street Elevated Railroad

Reporting mark: LSER
CTA - Chicago 'L' (Cook County, Illinois)
Built in stages 1892 to 2021. CTA created October 1, 1947 by combining all previous rapid transit lines.
Viaduct and tunnel system across entire City of Chicago on Chicago Transit Authority
Open to traffic

Lake Street Swing Bridge (Cook County, Illinois)
Built 1886, replaced 1916
Lost Through truss bridge over South Branch Chicago River on Lake Street, Lake Street Elevated Railway
Replaced by a new bridge