Chicago Transit Authority

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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)
Abandoned

CTA Des Plaines Ave Bridge (Cook County, Illinois)
Built in 1959
Deck plate girder bridge over Des Plaines Ave on CTA
Open to traffic

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

CTA Englewood Bridge (Cook County, Illinois)
Pratt through truss bridge over Metra RR (formerly C&WI RR) on Chicago Transit Authority
Open to traffic

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

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

Metropolitan Elevated Railroad Bridge (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

Montrose Avenue Bridge (McHenry County, Illinois)
Built 1916 for Milwaukee Road, tracks removed 1975, moved to Illinois Railway Museum 1998
Pony/through plate girder bridge over Montrose Avenue on Milwaukee Road RR
In storage

Wells Street Bridge (Cook County, Illinois)
Built 1922, rehabilitated 2013
Bascule bridge over Main Branch Chicago River on N. Wells Street in Chicago
Under major rehabilitation. Open to railroad traffic only. Closed to cars and pedestrians.