(Baltimore & Ohio is formerly Chicago Terminal & Transfer Railroad.)
Ordinances passed by the City of Chicago, requiring the railroads to elevate their trackage. Ordinances are listed chronologically at the Chicago Track Elevation page, which contains a more comprehensive background on track elevation in Chicago.
Ordinances are listed sequentially along the line, along with further commentary.
Washtenaw Ave. to 44th Ave.
December 10, 1906
Ordinance for elevation of Chicago Terminal & Transfer Railroad Altenheim Line from Washtenaw Ave. to 44th Ave. (now Kostner Ave.). Deadline for completion December 31, 1910. Deadline for completion December 31, 1906. Ordinance amended December 19, 1910, extending deadline for completion to July 31, 1912.
44th Ave. to 48th Ave.
October 22, 1906
Ordinance for elevation of Belt Railway of Chicago from Adams St. to Ogden Ave., and elevation of Chicago Terminal & Transfer Railroad Altenheim Line from 44th Ave. (now Kostner Ave.) to 48th Ave. (now Cicero Ave.). Ordinance also for raising of Metropolitan West Side Elevated Railway bridge at 46th Ave. over Belt Railway of Chicago. Deadline for completion December 31, 1916.
Laramie Ave.
December 2, 1936
Ordinance for depressed subway under Baltimore & Ohio Altenheim Line at Laramie Ave. Ordinance amended July 9, 1937, revising plan to a Laramie Ave. viaduct.
Central Ave. to Austin Blvd.
May 26, 1944
Ordinance for grade separations of Baltimore & Ohio Altenheim Line and paralleling rapid transit line, where they would be paralleled by planned West Route of the Comprehensive Superhighway System. An October 31, 1940 ordinance had approved this West Route of the Comprehensive Superhighway System, which later became known as the Eisenhower Expressway. These grade separations would include a subway for Central Ave., and a depressed railroad right of way under Austin Blvd.