Chicago Transit Authority

Reporting mark: CTA
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"Polly "L"" Bridge (Cook County, Illinois)
Built 1898 for Metropolitan West Side Elevated; route abandoned 1964
Camelback through truss bridge over UP RR (formerly C&NW RR) on an Abandoned Metropolitan West Side Elevated Railroad line
Abandoned

95th Street Bridge (Old) (Cook County, Illinois)
Built 1902; Replaced 1958
Lost bascule truss bridge over Calumet River on 95th Street
Replaced by a new bridge

Cortland Street Bridge (Cook County, Illinois)
Built 1901-02
Double-leaf bascule bridge over North Branch Chicago River on W. Cortland Street in Chicago
Open to traffic

CRT/BRC Overpass (Cook County, Illinois)
Built 1895 for Metropolitan-West Side Elevated Railroad, removed c1958
Lost Through truss bridge over Belt Railway of Chicago on Metropolitan West Side Elevated Railroad
Removed but not replaced

CRT/CTA Lake Street Transfer (Cook County, Illinois)
Built 1895; Route abandoned and likley removed 1964
Lost Pony plate girder bridge over Chicago Transit Authority on Chicago Rapid Transit
Removed

CSL - Central Station Bridge (Cook County, Illinois)
Built 1933; Removed 1974
Lost Steel stringer bridge over Illinois Central Railroad on Chicago Surface Lines
Removed

CTA Blue Line - Des Plaines Avenue Overpass (Cook County, Illinois)
Built in 1959
Deck plate girder bridge over Des Plaines Ave on CTA
Open to traffic

CTA Blue Line - Eisenhower Expressway Overpass (Cook County, Illinois)
Built 1959
Pony/through plate girder bridge over Eisenhower (Ike) Expy/I-290 on CTA
Open to traffic

CTA Brown Line - North Branch Chicago River Bridge (Cook County, Illinois)
Built in the 1920s as a "shoo-fly", Replaced 1981
Lost Steel stringer bridge over North Branch Chicago River on Chicago Transit Authority Brown Line
Replaced by a new bridge

CTA Green Line - Englewood Rail Crossing (Cook County, Illinois)
Built 1906
Pratt through truss bridge over Metra on Chicago Transit Authority
Open to traffic

CTA Green Line/IC Overpass (Cook County, Illinois)
Built 1892; Closed 1982; Removed 1984
Lost Pennsylvania through truss bridge over Illinois Central Railroad on Chicago Transit Authority Green Line
Removed

CTA Green Line/Northwestern Terminal Overpass (Cook County, Illinois)
Built ca. 1909; Replaced when the terminal was rebuilt, sometime after 1994
Lost Warren through truss bridge over Metra on Chicago Transit Authority Green Line
Replaced by a new bridge

CTA Pink Line - Ogden Avenue Overpass (Cook County, Illinois)
Deck plate girder bridge over Ogden Ave (Old Rotute 66) on CTA Pink Line
Open to traffic

CTA Pink Line/BOCT Overpass (Cook County, Illinois)
Replaced with a TPG ca. 1981
Lost Camelback through truss bridge over Baltimore & Ohio Chicago Terminal on Chicago Transit Authority Pink Line
Replaced by a new bridge

CTA Purple Line - Colfax Street Bridge (Cook County, Illinois)
Built 1908
Slab bridge over Colfax Street on CTA Purple Line
Open to traffic

CTA Purple Line - Hamlin Street Bridge (Cook County, Illinois)
Built 1908
Slab bridge over Hamlin Street on CTA Purple Line
Open to traffic

CTA Purple Line - North Shore Channel Bridge (Cook County, Illinois)
Warren through truss with all verticals bridge over North Shore Channel on Chicago Transit Authority
Open to traffic

CTA Purple Line - Ridge Avenue Bridge (Cook County, Illinois)
Pony/through plate girder bridge over Ridge Avenue/Lincoln Street on CTA Purple Line
Open to traffic

CTA Purple Line - Simpson Street Bridge (Cook County, Illinois)
Built 1908
Slab bridge over Simpson Street on CTA Purple Line
Open to traffic

CTA Red/Green Lines - Dan Ryan Double Bridge (Cook County, Illinois)
Original 'L' line built 1905. Bridge built 1961 as part of construction of Dan Ryan Expressway
Steel stringer bridge over I/90-94, CTA Red Line 'L' on CTA Green Line 'L'
Open to traffic

CTA Yellow Line - North Shore Channel Bridge (Cook County, Illinois)
Built 1925
Warren deck truss bridge over North Shore Channel on Chicago Transit Authority (formerly Chicago North Shore & Milwaukee)
Open to traffic

CTA/CWI Overpass (Cook County, Illinois)
Built 1907; Removed 1957
Lost Through truss bridge over Chicago & Western Indiana Railroad on Chicagoo Transit Authority
Removed

CWI - 51st Street Overpass (Cook County, Illinois)
Steel stringer bridge over 51st Street on Chicago & Western Indiana
Open

Halsted Street Bridge (Cook County, Illinois)
Built 1934; rehabilitated 1988
Bascule bridge over South Branch Chicago River on Halsted Street in Chicago
Open to traffic

Halsted Street Lift Bridge (Cook County, Illinois)
Built 1894
Lost Pratt through truss bridge over South Branch Chicago River on Halsted Street
Replaced by a new bridge

Halsted Street Overpass (Cook County, Illinois)
Replaced 1971
Lost Pratt through truss bridge over Chicago, Milwaukee, St. Paul & Pacific Railroad on Halsted Street
Replaced by a new bridge

Indiana Avenue Bridge (Old) (Cook County, Illinois)
Built 1914; Replaced 1977
Lost Double-intersection Warren through truss bridge over Little Calumet River on Indiana Avenue
Replaced by a new bridge

Lake Street Bridge (Cook County, Illinois)
Built 1916
Bascule bridge over South Branch Chicago River on Lake Street and CTA Green/Pink Lines in Chicago
Open to traffic

Metra - Cermak Road Overpass (Cook County, Illinois)
Steel rigid frame bridge over Cermak Road on Metra
Open to traffic

Milwaukee Avenue Viaduct (Cook County, Illinois)
Lost Warren through truss bridge over Chicago, Milwaukee, St. Paul & Pacific Railroad on Milwaukee Avenue
Removed

UP - I-290 Bridge (Cook County, Illinois)
Built 1898, I-290 Spans added 1952
Deck plate girder bridge over I-290, CTA Blue Line and Congress Parkway on Union Pacific Railroad
Open to traffic

UP - South Western Avenue Overpass (Cook County, Illinois)
Steel stringer bridge over South Western Avenue on Union Pacific Railroad
Open to traffic

Wells Street Bridge (Cook County, Illinois)
Built 1922, rehabilitated 2013
Double-leaf bascule bridge over Main Branch Chicago River on N. Wells Street and CTA 'L' in Chicago
Open